Dynamics of the outer radiation belts in relation to polar substorms and hot plasma injections at geostationary altitude
Geostationary satellite and ground measurements of dynamic variations of the outer radiation belts and their relations with the development of auroral structures during magnetospheric substorms are analyzed. A comparison of measurements of the H or X geomagnetic field components made by seven aurora...
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1981
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ftnasantrs:oai:casi.ntrs.nasa.gov:19820026628 2023-05-15T18:48:57+02:00 Dynamics of the outer radiation belts in relation to polar substorms and hot plasma injections at geostationary altitude Sauvaud, J. A. Winckler, J. R. Unclassified, Unlimited, Publicly available Jun 1, 1981 http://ntrs.nasa.gov/search.jsp?R=19820026628 unknown http://ntrs.nasa.gov/search.jsp?R=19820026628 Accession ID: 82A10163 Copyright Other Sources 93 Annales de Geophysique; 37; Apr 1981 ftnasantrs 2012-02-15T14:58:52Z Geostationary satellite and ground measurements of dynamic variations of the outer radiation belts and their relations with the development of auroral structures during magnetospheric substorms are analyzed. A comparison of measurements of the H or X geomagnetic field components made by seven auroral stations with ATS-6 low-energy and high-energy particle measurements during the multiple-onset substorm of Aug. 16, 1974 is presented which demonstrates that while the decrease in energetic particle fluxed ends only at the time of a strong substorm onset, rapid motions of the outer radiation belts may occur during the flux decrease. All-sky photographs of auroral phenomena taken at Fort Yukon and College, Alaska are then compared with ATS-1 energetic particle flux measurements in order to demonstrate the relation between flux decreases and increases and distinct substorm phases. Results support the hypothesis of a magnetospheric substorm precursor which appears to be an instability growing at the inner boundary of the plasma layer and approaching the earth, and underline the importance of current and magnetic field variations in charged particle dynamics. Other/Unknown Material Alaska Yukon NASA Technical Reports Server (NTRS) Yukon |
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Open Polar |
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NASA Technical Reports Server (NTRS) |
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ftnasantrs |
language |
unknown |
topic |
93 |
spellingShingle |
93 Sauvaud, J. A. Winckler, J. R. Dynamics of the outer radiation belts in relation to polar substorms and hot plasma injections at geostationary altitude |
topic_facet |
93 |
description |
Geostationary satellite and ground measurements of dynamic variations of the outer radiation belts and their relations with the development of auroral structures during magnetospheric substorms are analyzed. A comparison of measurements of the H or X geomagnetic field components made by seven auroral stations with ATS-6 low-energy and high-energy particle measurements during the multiple-onset substorm of Aug. 16, 1974 is presented which demonstrates that while the decrease in energetic particle fluxed ends only at the time of a strong substorm onset, rapid motions of the outer radiation belts may occur during the flux decrease. All-sky photographs of auroral phenomena taken at Fort Yukon and College, Alaska are then compared with ATS-1 energetic particle flux measurements in order to demonstrate the relation between flux decreases and increases and distinct substorm phases. Results support the hypothesis of a magnetospheric substorm precursor which appears to be an instability growing at the inner boundary of the plasma layer and approaching the earth, and underline the importance of current and magnetic field variations in charged particle dynamics. |
format |
Other/Unknown Material |
author |
Sauvaud, J. A. Winckler, J. R. |
author_facet |
Sauvaud, J. A. Winckler, J. R. |
author_sort |
Sauvaud, J. A. |
title |
Dynamics of the outer radiation belts in relation to polar substorms and hot plasma injections at geostationary altitude |
title_short |
Dynamics of the outer radiation belts in relation to polar substorms and hot plasma injections at geostationary altitude |
title_full |
Dynamics of the outer radiation belts in relation to polar substorms and hot plasma injections at geostationary altitude |
title_fullStr |
Dynamics of the outer radiation belts in relation to polar substorms and hot plasma injections at geostationary altitude |
title_full_unstemmed |
Dynamics of the outer radiation belts in relation to polar substorms and hot plasma injections at geostationary altitude |
title_sort |
dynamics of the outer radiation belts in relation to polar substorms and hot plasma injections at geostationary altitude |
publishDate |
1981 |
url |
http://ntrs.nasa.gov/search.jsp?R=19820026628 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Yukon |
geographic_facet |
Yukon |
genre |
Alaska Yukon |
genre_facet |
Alaska Yukon |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19820026628 Accession ID: 82A10163 |
op_rights |
Copyright |
_version_ |
1766242333270999040 |